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-rw-r--r--src/cryptography/hazmat/backends/openssl/ec.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/ec.py b/src/cryptography/hazmat/backends/openssl/ec.py
index 7d3afb94..b8692e49 100644
--- a/src/cryptography/hazmat/backends/openssl/ec.py
+++ b/src/cryptography/hazmat/backends/openssl/ec.py
@@ -119,6 +119,8 @@ class _ECDSASignatureContext(object):
@utils.register_interface(AsymmetricVerificationContext)
class _ECDSAVerificationContext(object):
def __init__(self, backend, public_key, signature, algorithm):
+ if not isinstance(signature, bytes):
+ raise TypeError("signature must be bytes.")
self._backend = backend
self._public_key = public_key
self._signature = signature